McGraw Hill Integrated II, 2012
MH
McGraw Hill Integrated II, 2012 View details
1. Graphing Quadratic Functions
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Exercise 71 Page 102

Recall that the graph of a quadratic function is symmetric about the axis of symmetry.

Point: (-1,9)
Explanation: See solution.

Practice makes perfect

Recall that the axis of symmetry is the vertical line through the vertex. Let's plot the vertex, the given point, and determine the axis of symmetry.

Recall that the graph of a quadratic function is symmetric about the axis of symmetry. As we can see above, the axis of symmetry is the line x=2. Now, we will reflect (5,9) across this line. Notice that (5,9) is 3 units to the right of the line, so it reflection will be 3 units to the left of the line.

Therefore, another point on the graph is (-1,9).